Typographical slug casting machine



June 29, 1937. c. A. ALBRECHT 2,085,139

TYPOGRAPHICAL SLUG CASTING MACHINE Filed May 15, 1955 lmrenior 4 MW Patented June 29, 1937 UNITED STATES 2,085,l39 TYPOGRAPHICAL SLUG CASTING MACHINE Christian Augustus Al Brooklyn, N. Y.

Application May 15, 1935, Serial In Germany May 6 Claims.

In typographical slug casting machines, wherein molten metal is ejected into a mould from a metal pot through a metal delivery throat terminating in a mouthpiece which contacts with the mould, the mouthpiece must be kept at a suitable temperature, to prevent solidification of metal in the discharge openings. It has therefore been proposed to heat the mouthpiece itself, in addition to heating the delivery throat, but

10 difilculties arise in connection with the employment of electric heating elements for this purpose, more particularly in locating the elements, in the limited space available, in a position in which efiicient transference of heat to the mouth piece can take place.

With the object of overcoming these difficulties, the present invention provides a metal-pot mouthpiece having a recess outside the metal delivery passage with a portion of its wall in close proximity to the said passage, into which the heating element is fitted in contact with said wall portion which constitutes a comparatively thin partition between the element and the metal within the delivery passage of the mouthpiece.

In a preferred constructional form, the recess is rectangular and has its upper wall closely underlying the delivery passage, and the heating element is L-shaped in cross-section so that it may be held in contact both with said upper wall and the rear wall of the recess to permit of effective transference of heat through the mouthpiece structure to the metal within the delivery passage. The recess is preferably closed by a cover plate, and clamping means operable from the exterior of the recess are provided for retaining the heating element in position.

The accompanying drawing shows, in central vertical section a portion of a delivery throat with a mouthpiece to which one constructional form of the invention is applied.

In the arrangement illustrated, the mouthpiece I) is attached to the metal-pot delivery throat a by means of screws or the like (not shown). The recess for the accommodation of a heating element is in this case formed in the lower part of the mouthpiece, and is substantially U-shaped in cross-section. The heating element c housed within this recess is preferably of angular form, or L-shaped in cross section, and is so held within the recess that one portion contacts with the underside of the wall cl which constitutes a comparatively thin partition between the mouthpiece passage and the recess, while the other portion of the element contacts with the rear wall e of the recess. The element 0 is held brecht, Berlin, assignor to Mergenthaler Linotype Germany, Company,

in position within the recess by clamping plates and m, the plate It being clamped against the underside of the plate m. by a screw or screws h, passing through the lower wall of the recess, and being also pressed towards the rear wall of the recess by a screw or screws 1' passing through a cover plate n by which the recess is closed. The cover plate "/1. may be secured against the front face of the lower wall of the recess by screws such as Z. Insulating plates f, 9, may be interposed between the plates 70, m and the respective portions of the heating element 0.

In some cases, a heating element contacting only with the wall d may be sufficient, especially as it is at that part that effective heating of the mouthpiece is most important. However, as the walls (2 and e of the recess constitute connected parts of the mouthpiece structure, a heating element of L-shaped cross-section, contacting with both walls as shown, serves to supply additional heat to the mouthpiece passage by conduction through the wall c.

Having described my invention, I declare that what I claim and desire to secure by Letters Patent is:-

1. In a typographical slug casting machine, the combination of a metal-pot mouthpiece having a recess outside the metal delivery passage with a portion of its wall in closed proximity to and extending longitudinally of the said passage, and an electric heating element housed within the recess in direct contact with said wall portion.

2. In a typographical slug casting machine, the combination of a metal-pot mouthpiece having a rectangular recess, one wall of which lies closely beneath and extends longitudinally of the metal delivery passage, and an electric heating element supported within the recess in direct contact with said wall.

3. In a typographical slug casting machine, the combination of a metal-pot mouthpiece having a rectangular recess, one wall of which lies closely beneath and extends longitudinally of the metal delivery passage, and a heating element L-shaped in cross-section supported within the recess in direct contact with both the before-mentioned wall of the recess and an adjacent wall thereof.

4. In a typographical slug casting machine, the combination of a metal-pot mouthpiece having an open rectangular recess extending inwardly from the face of the mouthpiece, one wall of which recess lies closely beneath and extends longitudinally of the metal delivery passage, a heating element supported Within the recess in direct contact with the said recess wall, a cover upper Wall and the rear wall of the recess, a cover plate adapted to close the recess, two clamping plates within the recess and means operable from the exterior of the recess adapted to adjust said plates respectively towards the upper and rear Walls of the recess.

6. In a typographical slug casting machine, the combination according to claim 5, characterized by insulating plates interposed between the clamping plates and the heating element.

CHRISTIAN AUGUSTUS ALBRECHT. 

